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(12) Patent: | (11) CA 2260816 |
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(54) English Title: | PROCESS FOR REMOVING NOX FROM NITROSYLSULPHURIC ACID |
(54) French Title: | PROCEDE D'ELIMINATION DU NOX CONTENU DANS L'ACIDE NITROSYLSULFURIQUE |
Status: | Term Expired - Post Grant Beyond Limit |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | ROBIC AGENCE PI S.E.C./ROBIC IP AGENCY LP |
(74) Associate agent: | |
(45) Issued: | 2009-01-06 |
(86) PCT Filing Date: | 1996-07-16 |
(87) Open to Public Inspection: | 1998-01-22 |
Examination requested: | 2003-07-10 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/EP1996/001719 |
(87) International Publication Number: | EP1996001719 |
(85) National Entry: | 1999-01-14 |
(30) Application Priority Data: | None |
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Nitrosylsulphuric
acid is mixed in a mixing
reactor with sulphuric
acid saturated with SO2.
The acid mixture is led
into a saturating reactor
into the bottom region
of which water and
an SO2-containing gas
are introduced. The
gas partially serves
as stripping gas inside
the saturating reactor.
SO2-saturated, NO x-free
sulphuric acid with 5 to 60
wt % H2SO4 is removed
from the bottom region of
the saturating reactor and
part thereof is mixed with
nitrosylsulphuric acid in
the mixing reactor.
L'acide nitrosylsulfurique est mélangé dans un réacteur mélangeur avec de l'acide sulfurique saturé de SO>2<. Le mélange d'acides est conduit jusqu'à un réacteur de saturation dans lequel pénètrent, par sa région inférieure, de l'eau et un gaz qui contient du SO>2<. Ce gaz sert partiellement de gaz de lavage dans le réacteur de saturation. L'acide sulfurique saturé de SO>2,<, exempt de NO>x< et contenant de 5 à 60 % en poids de H>2<SO>4<, est enlevé du réacteur de saturation par sa région inférieure et une partie de cet acide est mélangé à l'acide nitrosylsulfurique dans le réacteur mélangeur.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Description | Date |
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Inactive: Expired (new Act pat) | 2016-07-16 |
Inactive: Correspondence - MF | 2010-08-10 |
Grant by Issuance | 2009-01-06 |
Inactive: Cover page published | 2009-01-05 |
Inactive: Final fee received | 2008-10-15 |
Pre-grant | 2008-10-15 |
Notice of Allowance is Issued | 2008-05-01 |
Letter Sent | 2008-05-01 |
4 | 2008-05-01 |
Notice of Allowance is Issued | 2008-05-01 |
Inactive: IPC assigned | 2008-04-30 |
Inactive: Approved for allowance (AFA) | 2008-03-11 |
Amendment Received - Voluntary Amendment | 2007-12-24 |
Inactive: S.30(2) Rules - Examiner requisition | 2007-07-05 |
Inactive: IPC from MCD | 2006-03-12 |
Letter Sent | 2003-08-14 |
Request for Examination Requirements Determined Compliant | 2003-07-10 |
All Requirements for Examination Determined Compliant | 2003-07-10 |
Request for Examination Received | 2003-07-10 |
Inactive: Applicant deleted | 1999-10-20 |
Letter Sent | 1999-06-09 |
Inactive: Cover page published | 1999-05-24 |
Inactive: Correspondence - Formalities | 1999-04-27 |
Inactive: Single transfer | 1999-04-27 |
Inactive: First IPC assigned | 1999-03-25 |
Classification Modified | 1999-03-25 |
Inactive: IPC assigned | 1999-03-25 |
Inactive: IPC assigned | 1999-03-25 |
Inactive: Courtesy letter - Evidence | 1999-03-10 |
Inactive: Notice - National entry - No RFE | 1999-03-08 |
Application Received - PCT | 1999-03-05 |
Application Published (Open to Public Inspection) | 1998-01-22 |
There is no abandonment history.
The last payment was received on 2008-06-19
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
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web page to see all current fee amounts.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
METALLGESELLSCHAFT AKTIENGESELLSCHAFT |
Past Owners on Record |
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DIETER KNOBLICH |
EGON WINKLER |
GEORG SCHMIDT |
HARTMUT WAGNER |
PETER-BERNHARD STOUGIE |
ROLAND FACH |
RONALD APEL |